ULN2064B - ULN2066B
ULN2068B - ULN2070B
ULN2074B - ULN2076B
50V - 1.5A QUAD DARLINGTON SWITCHES
.
.
.
.
.
.
OUTPUT CURRENT TO 1.5 A EACH DAR-
LINGTON
MINIMUM BREAKDOWN 50 V
SUSTAINING VOLTAGE AT LEAST 35 V
INTEGRAL
SUPPRESSION
DIODES
(ULN2064B, ULN2066B, ULN2068B and
ULN2070B)
ISOLATED
DARLINGTON
PINOUT
(ULN2074B, ULN2076B)
VERSIONS COMPATIBLE WITH ALL POPU-
LAR LOGIC FAMILIES
DESCRIPTION
Designed to interface logic to a wide variety of high
current, high voltageloads, thesedeviceseach con-
tain four NPN darlington switches delivering up to
1.5 A with a specified minimum breakdown of 50 V
and a sustaining voltage of 35 V measured at 100
mA. The ULN2064B, ULN2066B, ULN2068B and
ULN2070B contain integral suppression diodes for
inductive loads have common emitters. The
ULN2074B and ULN2076B feature isolated dar-
lington pinouts and are intended for applications
such as emitter followerconfigurations.Inputsof the
ULN2064B, ULN2068B and ULN2074B are com-
patible with popular 5 V logic families and the
ULN2066B and ULN2076B are compatible with 6-
15 V CMOS and PMOS. Types ULN2068B and
ULN2070Binclude a predriverstageto reduceload-
ing on the control logic.
PIN CONNECTIONS AND ORDER CODES
POWERDIP
12 + 2 + 2
ULN2064B
ULN2066B
ULN2068B
ULN2070B
ULN2074B
ULN2076B
1/8
April 1993
ULN2064B-ULN2066B-ULN2068B-ULN2070B-ULN2074B-ULN2076B
SCHEMATIC DIAGRAM
ULN2064B : R
IN
= 350
Ω
ULN2066B : R
IN
= 3k
Ω
ULN2068B : R
IN
= 2.5k
Ω
, R
s
= 900
Ω
ULN2070B : R
IN
= 11.6k
Ω
, R
s
= 3.4k
Ω
ULN2074B : R
IN
= 350
Ω
ULN2076B : R
IN
= 3k
Ω
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CEX
V
CE(sus)
I
O
V
i
I
I
V
s
P
tot
T
amb
T
stg
Output Voltage
Output Sustaining Voltage
Output Current
Input Voltage
Input Current
Supply Voltage
for ULN2068B
for ULN2070B
for ULN2066B – 2070B - 2074B - 2076B
for ULN2064B – 2068B
Parameter
Value
50
35
1.75
30
15
25
10
20
4.3
1
– 20 to 85
– 55 to 150
Unit
V
V
A
V
V
mA
V
V
W
W
°
C
°C
Power Dissipation at T
pins
= 90
°C
at T
amb
= 70
°C
Operating Ambient Temperature Range
Storage Temperature
ELECTRICAL CHARACTERISTICS
(T
amb
= 25
o
C unless otherwise specified )
Symbol
I
CEX
Parameter
Output Leakage Current
Test Conditions
V
CE
= 50V
T
amb
= 25°C
T
amb
= 70°C
I
C
= 100mA, V
i
= 0.4V
I
C
I
C
I
C
I
C
=
=
=
=
500mA
750mA
1A
1.25A
I
B
I
B
I
B
I
B
=
=
=
=
625µA
935
µ
A
1.25mA
2mA
1.4
3.3
0.6
1.7
35
1.1
1.2
1.3
1.4
4.3
9.6
1.8
5.2
0.55
1.0
0.4
1.25
Min.
Typ.
Max.
100
500
Unit
µA
µA
V
V
V
V
V
mA
mA
mA
mA
mA
mA
mA
mA
Fig.
1
V
CE(sus)
V
CE(sat)
Collector-emitter Sustaining Voltage
Collector-emitter Saturation Voltage
2
3
3
3
3
4
4
4
4
4
4
4
4
I
i(on)
Input Current
for ULN2064B and ULN2074B
V
i
= 2.4V
V
i
= 3.75V
for ULN2066B and ULN2076B
V
i
= 5V
V
i
= 12V
for ULN2068B
V
i
= 2.75V
V
i
= 3.75V
for ULN2070B
V
i
= 5V
V
i
= 12V
2/8
ULN2064B-ULN2066B-ULN2068B-ULN2070B-ULN2074B-ULN2076B
ELECTRICAL CHARACTERISTICS
(T
amb
= 25
o
C unless otherwise specified ) (continued)
Symbol
V
i(on)
Parameter
Input Voltage
Test Conditions
V
CE
= 2V, I
C
= 1A
ULN2064B, ULN2074B
ULN2066B, ULN2076B
V
CE
= 2V, I
C
= 1.5A
ULN2064B, ULN2074B
ULN2066B, ULN2076B
ULN2068B
ULN2070B
for ULN2068B
I
C
= 500mA, V
i
= 2.75V
for ULN2070B
I
C
= 500mA, V
i
= 5V
0.5 V
i
to 0.5 V
o
0.5 V
i
to 0.5 V
o
for ULN2064B-ULN2066B
and ULN2068B-ULN2070B
V
R
= 50 V
T
amb
= 25°C
T
amb
= 70°C
for ULN2064B-ULN2066B
and ULN2068B-ULN2070B
I
F
= 1 A
I
F
= 1.5 A
Min.
Typ.
Max.
2
6.5
2.5
10
2.75
5
6
4.5
1
1.5
Unit
V
V
V
V
V
V
mA
mA
µ
s
µ
s
6
50
100
µA
µA
7
1.75
2
V
V
Fig.
5
5
5
5
5
5
8
8
I
s
Supply Current
t
PLH
t
PHL
I
R
Turn-on Delay Time
Turn-off Delay Time
Clamp Diode Leakage Current
V
F
Clamp Diode Forward Voltage
No tes :
1. Input voltage is with reference to the substrate (no connection to any other pins) for the ULN2074B and ULN2076B
reference is ground for all other types.
2. Input current may be limited by maximum allowable input voltage.
TEST CIRCUITS
Figure 1.
Figure 2.
Figure 3.
Figure 4.
3/8
ULN2064B-ULN2066B-ULN2068B-ULN2070B-ULN2074B-ULN2076B
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9 :
Input Current as a Function of
Input Voltage.
Figure 10 :
Input Current as a Function of
Input Voltage.
Figure 11 :
Collector Current as a Function of
Input Current.
4/8
ULN2064B-ULN2066B-ULN2068B-ULN2070B-ULN2074B-ULN2076B
MOUNTING INSTRUCTIONS
The R
th j-amb
can be reduced by soldering the GND
pins to a suitable copper area of the printed circuit
board (Fig. 12) or to an external heatsink (Fig. 13).
The diagram of Figure 14 shows the maximum dis-
sipable power P
tot
and the R
th j-amb
as a function of
the side ”α” of two equal square copper areas hav-
ing a thickness of 35
µ
(1.4 mils).
Figure 12 :
Example of P.C. Board Area which is
Used as Heatsink.
During soldering the pins temperature must not ex-
ceed 260
°C
and the soldering time must not be
longer than 12 seconds.
The external heatsink or printed circuit copper area
must be connected to electrical ground.
Figure 13 :
ExternalHeatsink Mounting Example.
Figure 14 :
Maximum Dissipable Power and Junc-
tion to Ambient Thermal Resistance
vs. Side ”α”.
Figure 15 :
Maximum Allowable Power Dissipa-
tion vs. Ambient Temperature.
5/8
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